Project2/packet.cpp at master · Matrix9494/Project2 · GitHub

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#include <string.h>
#include <thread>
#include <iostream>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <netdb.h>
#include <fstream>
#include <cassert>
#include <sys/time.h>
#include <vector>
#include <set>

using namespace std;

const uint32_t MAX_SEQ_NUM = 25600;
const uint16_t MAX_PKT_LEN = 524;
const uint16_t INIT_CWND_SIZE = 512;
const uint16_t INIT_SS_THRESH = 5120;
const uint16_t MIN_SS_THRESH = INIT_CWND_SIZE;
const uint16_t CWND_MAX_SIZE = 10240;
const uint32_t RETRANS_TIMEOUT = 500000;
const int abort_timeout = 10;


string flag_in_str = "";
#define SYN 0x2
#define ACK 0x4
#define FIN 0x1
#define SYN_ACK SYN|ACK
#define ACK_FIN ACK|FIN

#define MSS 524
#define DATA_SIZE 512


struct header
{
  short seq;
  short ack;
  int flag;
  int lendata;
  //char extra[3];
};

struct packet
{
  header head;
  char data[DATA_SIZE];

};

struct packet_head
{
  header head;
  bool nul;
};
//current seq number should be current + data size

//current ack should be oppsite seq number + oppsite data size

void generate_packet(packet &pac,   short seq,   short ack,   int flag, char*buf, int lendata)
{
  // pac.head.seq = htonl(seq);
  // pac.head.ack = htonl(ack);
  // pac.head.flag = htonl(flag);

  pac.head.seq = seq;
  pac.head.ack = ack;
  pac.head.flag = flag;
  pac.head.lendata = lendata;
  for (int i= 0; i < lendata; i++)
  {
    pac.data[i] = buf[i];
  }


}


void generate_packet_head(packet_head &pac,   short seq,   short ack,   int flag)
{
  pac.head.seq = seq;
  pac.head.ack = ack;
  pac.head.flag = flag;

}